The objective of this paper was to introduce a new type of retentive clasp (B-Clasp) for the removable appliance that engages the roof of the molar tube in the fixed appliance. It is a bi-helix clasp made from 0.7 mm stainless steel wire and consists of mesial helix, bridge, distal helix, flyover and tag. Its fabrication and clinical applications are presented. Clinically, the B-clasp proved to be practical, effective and retentive in several clinical applications in orthodontics.